Congrats on your new dragon. The color on her feet wont hurt her, but it will hurt her to eat the calci-sand, which they often do. It clumps up in their guts, causing an impaction and can cause paralysis...or worse. Not many people here will advocate using calci-sand. The best substrates for you to use would be non-stick shelf liner, (this is the personal favorite here. Duck brand from Wal-Mart.), reptile carpet, newspaper, paper towels, butcher's paper, or any non-particle type substrate.
Your temps sound ok. You may want to try offering a range on the cool side of 75-85, if you can.
Red leaf and carrots wouldn't be a good staple for her, for fabulous nutritional infomation, check out the link below.
Try some butternut squash to get her eating her greens and veggies, most dragons love it and it's really good for them, too.
Also, how many crickets are you offering and what size? The general rule is that prey shouldn't be larger than the space between their eyes, except in the case of soft-bodied prey, like silkworms. Speaking of silkies...they're great! A good staple feeder and really good for picky eaters, you may want to give them a try.
Do you have a good UVB source?
Just try waiting it out, she's probably stressed and that would affect her appetite. Definitely get her off the calci-sand immediately. It also wouldn't hurt to take a fecal sample into a vet soon, just to check. Good luck with her.
-Nicky
www.beautifuldragons.com
www.silkwormfarm.com
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Clowns to the left of me
Jokers to the right
Here I am, stuck in the middle with you...

2.1 Bearded Dragons: Gordo, Layne, & Chiquita
2.4 Cats: Zeus, Remi, Kiki, Delilah, Sadie & Cheyenne
1.0 Betta: Mr. Purple